_________ marks the break in the cell cycle between the end of mitosis and beginning of the synthesis stage. 21:28 Biology Chapter 6 _________ marks the break in the cell cycle between the end of mitosis and beginning of the synthesis stage. a) Gap 1 b) cytokinesis c) DNA Synthesis phase d) Gap 2 e) None of the above. Answer: a) Gap 1 Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+